Builders online delivery sucks

I ordered blocks on the 26th of August 2025. I received an SMS on the 27th, stating that my order has been handed over to the courier. I then enquired on the customer support email when my order will be delivered since I do not reside where I am currently building also becaause I am unable to track the order myself. The agent confirmed that it will be delivered on the 1st of September. I informed the builder about the feedback received and suddenly, today, the 29th I receive calls whilst in a meeting from Builders. I immediately text my builder to quickly go check whether the delivery van is there and he confirms and said that they refused to offload the blocks. Builders, please call before the delivery van leaves your yard like other courier services do so that a person ensures that there is someone to receive the delivery before the driver gets there to avoid delays because now the order went back and I now have to wait longer for my order.